From 9f984ff26ac248a27212a37ab34754a2e9261e8c Mon Sep 17 00:00:00 2001
From: John MacFarlane <jgm@berkeley.edu>
Date: Sat, 7 Sep 2019 11:23:12 -0700
Subject: Replace Element and makeHierarchical with makeSections.

Text.Pandoc.Shared:

+ Remove `Element` type [API change]
+ Remove `makeHierarchicalize` [API change]
+ Add `makeSections` [API change]
+ Export `deLink` [API change]

Now that we have Divs, we can use them to represent the structure
of sections, and we don't need a special Element type.
`makeSections` reorganizes a block list, adding Divs with
class `section` around sections, and adding numbering
if needed.

This change also fixes some longstanding issues recognizing
section structure when the document contains Divs.
Closes #3057, see also #997.

All writers have been changed to use `makeSections`.
Note that in the process we have reverted the change
c1d058aeb1c6a331a2cc22786ffaab17f7118ccd
made in response to #5168, which I'm not completely
sure was a good idea.

Lua modules have also been adjusted accordingly.
Existing lua filters that use `hierarchicalize` will
need to be rewritten to use `make_sections`.
---
 src/Text/Pandoc/Lua/Marshaling/AST.hs | 31 -------------------------------
 1 file changed, 31 deletions(-)

(limited to 'src/Text/Pandoc/Lua/Marshaling')

diff --git a/src/Text/Pandoc/Lua/Marshaling/AST.hs b/src/Text/Pandoc/Lua/Marshaling/AST.hs
index 7b428b5f0..c9d61d3e4 100644
--- a/src/Text/Pandoc/Lua/Marshaling/AST.hs
+++ b/src/Text/Pandoc/Lua/Marshaling/AST.hs
@@ -22,12 +22,9 @@ module Text.Pandoc.Lua.Marshaling.AST
 import Prelude
 import Control.Applicative ((<|>))
 import Foreign.Lua (Lua, Peekable, Pushable, StackIndex)
-import Foreign.Lua.Userdata ( ensureUserdataMetatable, pushAnyWithMetatable
-                            , metatableName)
 import Text.Pandoc.Definition
 import Text.Pandoc.Lua.Util (defineHowTo, pushViaConstructor)
 import Text.Pandoc.Lua.Marshaling.CommonState ()
-import Text.Pandoc.Shared (Element (Blk, Sec))
 
 import qualified Foreign.Lua as Lua
 import qualified Text.Pandoc.Lua.Util as LuaUtil
@@ -285,31 +282,3 @@ instance Pushable LuaListAttributes where
 instance Peekable LuaListAttributes where
   peek = defineHowTo "get ListAttributes value" .
          fmap LuaListAttributes . Lua.peek
-
---
--- Hierarchical elements
---
-instance Pushable Element where
-  push (Blk blk) = Lua.push blk
-  push sec = pushAnyWithMetatable pushElementMetatable sec
-   where
-    pushElementMetatable = ensureUserdataMetatable (metatableName sec) $
-                           LuaUtil.addFunction "__index" indexElement
-
-instance Peekable Element where
-  peek idx = Lua.ltype idx >>= \case
-    Lua.TypeUserdata -> Lua.peekAny idx
-    _                -> Blk <$> Lua.peek idx
-
-indexElement :: Element -> String -> Lua Lua.NumResults
-indexElement = \case
-  (Blk _) -> const (1 <$ Lua.pushnil) -- this shouldn't happen
-  (Sec lvl num attr label contents) -> fmap (return 1) . \case
-    "level"     -> Lua.push lvl
-    "numbering" -> Lua.push num
-    "attr"      -> Lua.push (LuaAttr attr)
-    "label"     -> Lua.push label
-    "contents"  -> Lua.push contents
-    "tag"       -> Lua.push "Sec"
-    "t"         -> Lua.push "Sec"
-    _           -> Lua.pushnil
-- 
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